Mouse keeps disconnecting and reconnecting, non stop. (It's fine)

Whenenver I try to use my mouse without a dongle (direct connection through bluetooth), I get the situation in the picture.

I'd like to give you more information but there isn't a pattern. It happens in the middle of using it. It happens when I don't move for a while, then suddenly move my mouse. It happens if I was using the scroll wheel for a while and started moving the mouse again. It has no learnable pattern.

The mouse works perfectly if I use the dongle. Mouse worked (probably still works) perfectly in Windows. I'm on Linux Mint (Zara)

I tried what little (4 threads) information I could find about this topic so I'm here.

Any solutions?

Edit: Thank you everyone but the solution to the problem is bigger than the problem. I thought it would be an easy solution but I need this USB slot once every 3 months, I can live with that :D