Yah. Until now, a complete sentence, "A tomato is tasty." Had always been correct. Now, suddenly, the program asserts ONLY the sentence fragment is correct. I reported it, and got a check box to say my answer should have been accepted. That suggests to me this is a problem they're trying to fix with an algorithm.
It's ag-van-IYA, you can always use a website or app like Reverso to play the word (in the reverso settings you can slow down the audio) gimel is ג , it's a g sound like guy, great. It only is a J sound for loanwords from another language. In that case it will look like this: ג' examples: ג'ון John דיג'י DJ