Devil’s ivy yellowing fast

Suddenly the leaves are yellowing and falling off – picture doesn't look too bad from afar but about 10 yellow leaves came off really easily yesterday. I've had this since it was tiny so am really hoping to fix it quickly. I occasionally find leaves yellowing/shedding, but this has been quite rapid over the last day.

Last week I was away and it fell over, so 5 days ago when I returned I unwound the vines and attached it to the wall for more stability and so the leaves could access more light (the pole was getting very crowded). I don’t think they sustained much damage (landed on my large jade plants with no snapped vines or leaves) and the room is bright light with no direct sunlight.

I also don't think it's just one vine dying but several. The dying leaves are currently on the lower half of the plant, but I'm worried it could spread to the upper half as it is moving so quickly. I wonder if the causes could be:

– my biggest theory is that because on Tuesday I used an old trowel as a stake to support the moss pole I have damaged the roots

– watering? it was very dry after my holiday, then I watered it three days ago. the pot has drainage holes. Although this isn’t very different to its usual watering schedule, maybe it needs more water following the dry spell (I’ve included a picture of the roots which are only really damp at the bottom)

– hopefully not pests! I have checked the soil and leaves with a torch and magnifying glass