Viewsonic boards constantly disconnecting from screen sharing app

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So our school has purchased around 15 viewsonic IFP-7550-02 and 03 boards. When using the Vcast app on the board and their installed app on a mac and windows pc it will disconnect several times a period sometimes up to 50 a day. Viewsonic customer support is absolutely terrible . Our WIFI signal is 5 bars in every room and a constant 60mpbs up and down so the WIFI is not the issue. Does anyone know if a fix or have there board? The boards are completely up to date as well as the app on the computers. I'm lost of this issue

[ViewSonicService]

Dear Customer

We apologise for the issues that you are having. May we kindly confirm where you are based? You can contact the ViewSonic service team by logging a ticket at https://www.viewsonic.com/eu/contact/ for our direct and prompt support if you are in the European region, or https://www.viewsonic.com/us/customer-service-form if you are in the US.