Mine are missing too! I looked it up on the help page and apparently GR is undergoing some routine maintenance and the missing progress bars are just temporary!
I thought it was just me! I made progress updates on my phone, but couldn’t do it via the computer. Speaking of the computer, I have been reading the Sun Sister on Apple Books on my laptop thanks to Anna, and today started the 39 hours of Dragonfly in Amber on audible also on my laptop. It’s been a multiwave experience! But did manage to get to the library today to pick up January’s fare, and also some kid books as well. Welcome to 2020!
I don't use this feature anymore, but I am so glad someone identified it is a GR glitch as this thread would've alleviated my inevitable anxieties had I been using this :P
My 'current reads' shows my books- but the spot to put my progress is gone.