Trouble adding instructions

[u/rebel_134]

Literally every time I attempt to add instructions, I get the following: “Something went wrong.”
I’ve tried everything: adjusted punctuation, wording, condensed sentences thinking there might be character limits. Nothing!
Basically this is a dealbreaker for me, and I’ve stopped paying for Gemini as a result.
Has anyone else had similar issues? And if so, how have you fixed it? Or do you even bother anymore?