ANSWER:

If you know that this is happening and you are still praying like that, your prayer is invalid. But if it happened without your intention and by accident, this is ok.  

My question is during salah sometimes my t-shirt or shirt goes up and expose awrah,so my salah is valid or invalid

Prayer | March 26, 2018 8:23 am
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Sheikh, is there a ruling to say the surahs in order in salah? E.g. if in the first rakah we say surah Falaq, can we not say surah Ikhlas in the subsequent rakah or we necessarily have to say surah Nas?
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Can a woman pray without her face uncovered in her home with abayah? I mean observing proper hijab but without covering the face.