Apple today seeded the fifth beta of iOS 10.3.2 to developers, bringing the build number to 14F5089a. It's actually the second one to be released this week, with the first being on Monday.
As the version number indicates, there are no new front-facing features in iOS 10.3.2. There are a few fixes - which are the same as in beta 4 - and those are that SiriKit car commands and third-party VPN apps should now work as expected, and Siri text responses are now complete.
As usual, there are also some notes and known issues, such as SOS only being supported in India, and the ability to update devices from a remote server not working as expected.
When Apple begins releasing beta builds with this frequency, it usually means that the company is gearing up for general availability. If it's not next week, it will likely be the following week.