We have the same problem.my code working in iOS 12 ,13 but not working in iOS 14 . TabBar hidden in automatically.

same issue i have got crash report for TestFlight review team ,app working in simulator and device .but app not run in review team side ,so please give me solution [https://iosapps-ssl.itunes.apple.com/itunes-assets/Purple114/v4/5e/83/9f/5e839fdb-ede6-6039-9889-441d8bd5f424/attachment.crashlog-952235E7-BEB6-4AD4-862E-E37FD3DE3F46.txt?accessKey=1608780944_5473096186772456625_HOjvUTkIqQOhQqs%2Fs0t2U0ZiuUgcC9579LdFPiwfFKheXhfpyYB%2FVZJTXwRJ%2BHiemJOfNniP5X3eH02ZyDVuilYXi%2FrSISV5YNppyyc18qNTydhQvzYakVcHD9QrvG2ytyAAD0IVBzM45mn9PlsK6vbaIoE9us4QosNEkW9P7vUucLqMNE%2BZoIQeozER53QGNi5ZnqM6UOBEo5WGytu3dvtuOVP%2FhQdMaE0zHOaDlBE%3D)