Never thought I'd agree with that statement, but yes in this case, good point!
Is it possible to make some of that text available through a hyperlink?
The other idea that occurs to me is to make that text part of the "Alpine Energy" graphic, which would give you more control over the font size.
In addition to what Jay Johnson said above, it could be a good idea to move some of that guidance into the survey. You could insert a note at the top of your survey with the text of the last sentence, which is mainly information for filling out the survey correctly, not information about the survey. If it's very important, you could even force the user to click a "I've read and understood the text above" button before proceeding to the rest of the survey. This may be a case where documentation should be done in a separate document alongside the metadata.
It does look like a bug in the Survey123 app though!
Phone App is 3.2.265
Phone is Samsung Galaxy J2 (SM-J200Y)
Not the latest and greatest, but it was my own device that I grabbed and downloaded the app and survey for a meeting with engineers to discuss the pre-field test vesion of the HV asset change form. They'll eventually enter the field app data on Galaxy Tab S3 and S4 models. So this isn't a deal breaker for us, but I thought I'd mention it for the community, in case others wanted to deploy on such a device. However, this device does work well with another emergency incident reporting survey which is short and sweet.
Thank you sharing your experience, Roger. It appears that that particular device has a screen resolution of 540 x 960, which may be a variable in the behavior. We recommend a screen resolution of 1024 x 768, as outlined here System requirements—Survey123 for ArcGIS | ArcGIS
Having said that, I will make a note of the issue you are encountering in our internal backlog. I think there were some great suggestions by others, above, and even if left as is, the display of the description should significantly improve when viewed with the Galaxy Tab's which are much larger devices with 2048 x 1536 resolution.