Caching might be causing issues - How I can see if its cached?

I have a WP site where sometimes when I deactivate a plugin it doesn't deactivate it but it give me the message its deactivated.

I have googled a bit and asked around in WP slack. The result is that I believe its caching causing it.

I played around with Redis on this server but as far as I know its not active anymore. I tried this "redis-cli shutdown" and not sure if thats enough to stop it. I ran it again and then I got this "Could not connect to Redis at 127.0.0.1:6379: Connection refused" I assume this means Redis is turned off.

Otherwise are there any other caching on Forge that could causes these issues?

Thank you in advance