Hello,
From your inquiry, it appears that the MSP 11 platform isn't installed on your system, but the older Windows Speech Recognition (WSR) is. If you're getting much better results with dictation using Win + H, you may want to install MSP 11 and try it (see more info here).
I have also noticed over the course of development a slight decline in recognition performance, due to several factors - and honestly Windows recognition can be very finicky. I am currently working on modifications that improve the overall recognition reliability and reduce differences between WSR and MSP11 performance. I highly recommend you check back to get the new update in a couple of weeks to see if it makes a difference for you. Plus I'm adding in support for some of the new features released in BMS 4.38.