This is a bug I experienced on my Windows computer only, an HP Omen desktop machine, 64-bit system, i7-7700K CPU 4.2 GHz, NVIDIA GeForce GTX 1080 Ti. I use both a mouse and a Huion pen tablet as input methods. This bug did not occur on Affinity Designer 1.6.
So, what happens is that after 5-10 minutes of work, the Selection tool and the Node Tool stop working. I am no longer able to move or select any object in the document. I cannot even draw a selection marquee. The behavior stops if I restart Designer, but reappears soon after. This bugs make the new version of Designer unusable for me. I went back to 1.6 after noticing it, but that's inconvenient. I also have a MacBook Pro with the 1.7 on it and since I always sync files between the two computers, I can't really work seamlessly.
I was hoping that the 1.7.1 update would fix the bug, but it didn't. It seems to me that it made it worse. The behavior occurs with all documents.
Is anyone else experiencing this bug?