MSOZoneCell_WebPart WPQ ID is keep changing

Hey Sal_Sal 

I've been having the very same issue. My case is somewhat similar to yours, where I have been using JavaScript, but I'm using it to toggle some form inputs to show/hide depending on a selection of a drop down. The id attribute of the web part itself keeps changing randomly on it's own timing in a way that I can't control, in turn, breaking my JavaScript functions. Thing is, this particular web part is actively being used at the office and when this occurs, I always have to notify the entire team to stop using it until I fix it, which in turn affects business processes in the end, each time.

I have been attempting to come up with another way to approach this issue, by attaching a custom id attribute to the DOM elements I want to target, but the changing of the original id is preventing me from doing so.

All in all, I would also like to know why this occurs, because it is severely affecting internal processes. I am in the process of developing this web part into a more robust web part using SPFx with React, however in the meantime, as quickly as I'm trying to learn SPFx, I would really need the classic web part to continue to work as it should.

Can more light be shed on this issue please?

Thank you.