Anybody else seeing this in your area?
I can repro the missing lakes in several of the basemaps. Not all basemaps are missing these features. I'll get that to the basemap team's attention, and report back with any updates as I get them.
This issue was apparently introduced earlier this year during an update. It will be corrected for all basemaps that show this in the next update coming in early April. Note that Living Atlas basemap updates (and other content updates) are not coupled to ArcGIS Online updates, rather they happen at their own cadence.