I had to revert back to 3.2.1 for awhile due to a pretty severe wifi bug. I thought the wifi antennae was going bad on my 6s (I've been in beta for quite some time)... over short periods of time the wifi connection would degrade, and I would have to tap on the wifi shortcut on my phone to turn it off and then back on (and had previously factory reset the phone several times to no avail, which is why I figured it was my antennae possibly going bad).
My fiance has an iPhone SE and not testing the beta... he never has wifi issues, but he has also not installed the update from yesterday. I've not had wifi issues on my Windows 10 laptop, and he has not had any wifi issues on his Macbook Pro work laptop that he is on all day throughout the week (he works from home).
I treated myself to a new iPad 9.7 (2017) for Mothers Day, and I updated it to 10.3.1 right after setup. No wifi issues. Yesterday I updated it to 10.3.2 and slowly my wifi connection went belly up just like on my iPhone.
I downgraded both iPad and 6s to 10.3.1 and have not had a single wifi issue all day.
Oh wow...At least you were able to figure out the cause.......Congratulations on getting your new iPad Pro, by the way?