Sending, receiving, and organizing email in Outlook on the web for business
This issue does not happen with all emails, and so it is difficult to track down. The commonality I've seen so far is 1) using Chrome and Outlook on the web 2) Replying or replying all to someone who generated an email in Desktop Outlook who uses light mode
Usually they send me a note back saying my email is blank, when it's actually white text. When I get a note back saying it is blank, I recolor the text (and text only) and preview in light mode before sending. Once sent, the email now has the recolored text with black highlight when viewed in light mode. It did not appear that way on preview and I never set a highlight.
I have not tested with other browsers because it is so hit/miss, I wouldn't know when to test. I can provide screenshots from a recent example, but would prefer to send directly to someone working on a ticket instead of embedding an image online.