core: nmap_tracker slowing down HA so much it is unusable

The problem

After upgrading to ha-core2021.7.0b3 my HA instance is no longer usable and gets restarted by the supervisor watchdog.

What is version of Home Assistant Core has the issue?

core-2021.7.0b3

What was the last working version of Home Assistant Core?

core-2021.7.0b0

What type of installation are you running?

Home Assistant OS

Integration causing the issue

nmap_tracker

Link to integration documentation on our website

https://www.home-assistant.io/integrations/nmap_tracker/

Example YAML snippet

device_tracker:
- platform: nmap_tracker
  hosts:
    - 10.1.1.0/24
  interval_seconds: 60
  consider_home: '0:05'
- platform: nmap_tracker
  hosts:
    - 10.2.2.0/24
  interval_seconds: 60
  consider_home: '0:05'
- platform: nmap_tracker
  hosts:
    - 10.5.5.0/24
  interval_seconds: 60
  consider_home: '0:05'
- platform: nmap_tracker
  hosts:
    - 10.6.6.0/24
  interval_seconds: 60
  consider_home: '0:05'

Anything in the logs that might be useful for us?

No response

Additional information

I have pasted the converted yaml to config_entries below.

I believe the issue might be related to the interval_seconds as it is not imported into the config_entry and might be scanning all the time, freezing the instance.

Also creating a new config_entry from the UI does not create the interval_seconds but editing after first creation puts it there.

            {                                                  
                "entry_id": "88670c9600003f2ee55c61e5f6f1c605",
                "version": 1,                                  
                "domain": "nmap_tracker",                      
                "title": "Nmap Tracker 10.1.1.0/24",           
                "data": {},                                    
                "options": {                                   
                    "hosts": "10.1.1.0/24",                    
                    "home_interval": 0,                          
                    "exclude": "",                             
                    "scan_options": "-F --host-timeout 5s"     
                },                                             
                "pref_disable_new_entities": false,            
                "pref_disable_polling": false,                 
                "source": "import",                            
                "unique_id": null,                             
                "disabled_by": null                            
            },                                                 
            {                                                  
                "entry_id": "a91f7a52a03e7ea75c031724b38cfeed",
                "version": 1,                                  
                "domain": "nmap_tracker",                      
                "title": "Nmap Tracker 10.2.2.0/24",           
                "data": {},                                                                    
                "options": {                                   
                    "hosts": "10.2.2.0/24",                    
                    "home_interval": 0,                        
                    "exclude": "",                             
                    "scan_options": "-F --host-timeout 5s"     
                },                                             
                "pref_disable_new_entities": false,            
                "pref_disable_polling": false,                 
                "source": "import",                            
                "unique_id": null,                             
                "disabled_by": null                            
            },
            {                                                  
                "entry_id": "f949aaa7b17dc94fcabedc0b90ba35f3",  
                "version": 1,                                  
                "domain": "nmap_tracker",                      
                "title": "Nmap Tracker 10.5.5.0/24",           
                "data": {},                                    
                "options": {                                   
                    "hosts": "10.5.5.0/24",                    
                    "home_interval": 0,                        
                    "exclude": "",                             
                    "scan_options": "-F --host-timeout 5s"     
                },                                             
                "pref_disable_new_entities": false,            
                "pref_disable_polling": false,                 
                "source": "import",                            
                "unique_id": null,                             
                "disabled_by": null                                                            
            },                                                 
            {                                                  
                "entry_id": "bb2e7c20b29b933db175d5a02d311425",
                "version": 1,                                  
                "domain": "nmap_tracker",                      
                "title": "Nmap Tracker 10.6.6.0/24",           
                "data": {},                                    
                "options": {                                   
                    "hosts": "10.6.6.0/24",                    
                    "home_interval": 0,                        
                    "exclude": "",                             
                    "scan_options": "-F --host-timeout 5s"     
                },                                             
                "pref_disable_new_entities": false,            
                "pref_disable_polling": false,                 
                "source": "import",                            
                "unique_id": null,                             
                "disabled_by": null                            
            },