Email headers loading but content missing
MacBook Air M1 running Sonoma 14.0. Some of the emails that come into my Inbox have only their headers. The content is blank. I can see the content on my iPhone and iPad, but not on my MacBook Air. The emails come from people in my Contacts, and seem to be randomly chosen. They'll load from that person one day and not the next. Can someone please help? TIA
MacBook Air 13″, macOS 10.15