Hunter XC Controller Funky

Hi I have a Hunter XC Controller about 18 years old that has started to act strange. For example today I set it to run all 7 zones manually and it reverted back to Zone 1 after running Zone 5. Never got to 6 or 7.

Actually this summer I'm afraid to let it run if not at home because I never know what funkiness might occur.

Is it time to buy a new controller?

Thanks