scrubby zoom greyed out on photoshop 21.2
hi! i've used photoshop to draw for almost two years now and have had little issuses. i've had issues with scrubby zoom before, but all i've had to do was restart photoshop and the problem was fixed. ive restarted photoshop and my computer a few times to no avail, scrubby zoom is still greyed out.
i only updated to photoshop 21.2 today. the issue was not present until after the update. i dont know if this is relevant.
here is what i've tried that i've seen on other posts.
-reset all brush presets
-reset all prefrences
-i've turned my gpu settings to basic
-use graphics processor is checked in graphics processsor settings
-in advanced settings, opencl and use graphics processer to accelerate is greyed out
-in windoes settings, set photoshop to highest performance
not sure of this is a bug for 21.2? is there any workaround or fix i haven't tried? scrubby zoom is essential for my work.
edit: when i click "reset tool" on the magifying glass scrubby zoom becomes checked, but is still greyed out. when i attempt to zoom, it is not scrubby zoom. when zoom action is completed they greyed out box unchecks (??)