Can't seem to edit sleep graph

Previously I used to be able to edit sleep time but highlighting and cutting. Now if I highlight a portion of the graph it immediately unhilights it before I can edit (Using Samsung S10 and the data is a sync from SHealth recorded on my watch).

Hello, could you please reproduce this, and then right away use Left ☰ menu > Report a bug? Which version are you using?

Will do, app info says Version 20200606

And when I highlight on the graph, wherever I highlight it says “[xx:xx,xx:xx]= = 0.00” where xx:xx is the start time of the sleep.