It appears to have been for some time now. I had read about TP LInk not being very good with firmware updates for this router, but I had assumed that it wold be bug free like my Archer D9 appeared to...

Same problem here. I just posted another topic for my VR900. Surprising this bug can be on multiple routers and STILL be outstanding, well at least it is for me on the latest firmware I can get for...

Model : Hardware Version : Firmware Version : ISP : SO it appears multiple routers ahve this problem of the limit of 9 address reservations until there is grey box overlay which stops any further...