bug fix

app.py

@@ -32,6 +32,7 @@ if manual_input:
         manual_entry.write('Transcript must be at least {:d} bases.'.format(TARGET_LEN))
     else:
         st.session_state['manual_seq'] = manual_input
+manual_mode = manual_entry.form_submit_button(label='calculate')
 
 # fasta input
 fasta_form = st.form('fasta')
@@ -49,13 +50,14 @@ if fasta_input:
     fasta_form.write(transcript_tbl)
     seq = transcript_tbl['seq'][0]
     st.session_state['fasta_seq'] = seq
+fasta_mode = fasta_form.form_submit_button(label='Calculate')
 
 # input-specific configuration
-if manual_entry.form_submit_button(label='Calculate'):
+if manual_mode:
     src_seq = st.session_state['manual_seq']
     status_text = manual_entry.empty()
     status_bar = manual_entry.progress(0)
-elif fasta_form.form_submit_button(label='Calculate'):
+elif fasta_mode:
     src_seq = st.session_state['fasta_seq']
     status_text = fasta_form.empty()
     status_bar = fasta_form.progress(0)