I've been seeing the misspelling of the past tense of lead (led) incredibly often in the past couple years. It's clearly confusing that lead is an actual word, so it may seem right and likely doesn't get caught by auto-correct, although I assume grammar correction should catch it.

Merriam Webster lists it as a valid spelling, and even uses that spelling in one of the example sentences

https://www.merriam-webster.com/dictionary/misled

Mislead is the present tense; Misled, the past tense.

I'm not seeing the tenses being used interchangeably with the same spelling on the site, but I may be missing it.