UK Freeview TV channel issue. When I first connected the Blink module, I plugged it in from a spare power socket close to my Lounge TV (also close range to cameras outside). I discovered that the Blink frequency blocked several HD channels. I switched off Blink and my channels came back up. Tried a couple of times to confirm cause before I moved the Blink unit to my hallway and the HD channels now work okay - so does Blink!
Welcome to the forum. It’s not really surprising given the close proximity to your TV that you experienced interference. 4G mobile phone signals can cause similar issues but can be overcome by using a module placed in-line of the aerial feed.
I’m happy that your simple relocation fix sorted out your issue.