Some Notes Are Not Being Triggered After Update To 3.5.2.44603

Studio One was working fairly well (a few crashes here and there, but nothing conceing), until I upgraded to the latest version (as of this writing). After the upgrade, I have noticed that a lot of notes from various instruments that use the piano roll are not being triggered. The notes appear on the grid, but are simply not triggered. This issue appears to be universal, happening in all instruments that are being triggered from the "piano roll", including everything from the included SampleOne instrument to 3rd party VSTs, such as A.N.A. and TAL Elektro. Audio files (such as recorded vocal, guitar, and bass guitar parts) are all playing, just fine.

System specs: Intel Core i7-4790K (4.0 GHz), 16 GB RAM, 2 TB hard drive with 1.26 TB free, Windows 10 Pro.

Any ideas what might cause this and a possible work-around?