Losing ability to call URLs temporarily

A couple of times lately I’ve woken up my iPad in the morning to find that all my search actions in Drafts just produce the spinning icon indefinitely. This happens regardless of whether the action is set to open in Safari or in Drafts, and it happens with a Filemaker Go fmp:// URL that doesn’t require an internet connection. And if I use the bookmarked URLs in Safari directly they work fine as does every other internet-connected app on the device. So it’s pretty clear it’s a Drafts-only problem. Restarting Drafts will fix it, but it’s an annoyance that wasn’t there in Drafts 4, and which I never saw in Drafts 5 until the last week or so.