The tags should be gone from the 'filter by' options if they've been removed from all products and collections. Are you still seeing the old tags listed there?
Ah, I see! Glad that's figured out for you now. Let me know if you have any more trouble with it.
I'd be happy to give you a hand. You'll first want to double check that all tags have definitely been removed - the easiest way to do this is by navigating to Products > All products > Select all products > Edit products > Add fields > Tags. You can then scroll through to be sure that none were missed. If everything is looking good there, let me know what theme you're using and we can see what your next steps will be. Cheers!
Glad to hear it's all sorted now. Feel free to let me know if you need any more help with it.
I'm having the same issue with the Debut theme. A product I listed and that's active does not show up because the site keeps showing tags in the 'filter by' dropdown that I deleted and will only show the product if I choose 'all products'. It keeps reverting top this even thought I've made sure the other tags are deleted from the listing.
This isn't happening with the other products I listed.
Please advise. I'd rather not have 'filter by' at all.